var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var { loadRoutes } = require("autoload-routes");

// var indexRouter = require('./routes/index');
// var usersRouter = require('./routes/users');

var app = express();
// 跨域设置
app.use(function (req, res, next) {
  res.setHeader("Access-Control-Allow-Origin", "*"); // 设置允许的来源，可以使用 * 表示允许所有来源
  res.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE"); // 设置允许的 HTTP 方法
  res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept"); // 设置允许的请求头
  next();
});

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
loadRoutes(app, path.join(__dirname, "routes"));

// app.use('/', indexRouter);
// app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
